File libtirpc-getbroadifs-crash.patch of Package libtirpc.4759

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File libtirpc-getbroadifs-crash.patch of Package libtirpc.4759

From 5aa9bf181ec1ce900ca4e84c62e3b31346478626 Mon Sep 17 00:00:00 2001
From: Olaf Kirch <okir@suse.de>
Date: Fri, 31 Jan 2014 16:37:25 +0100
Subject: [PATCH] Prevent a segfault of "rpcinfo -b" on systems with tuntap
 devices

Linux tuntap devices and other virtual network devices, if not
configured, will be reported by getifaddrs() with a NULL ifa_addr
pointer. __rpc_getifaddrs would trip over that, because it derefenced
the ifa_addr pointer without checking.

Signed-off-by: Olaf Kirch <okir@suse.de>
---
 src/clnt_bcast.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/clnt_bcast.c b/src/clnt_bcast.c
index 1055545..6ab0851 100644
--- a/src/clnt_bcast.c
+++ b/src/clnt_bcast.c
@@ -143,7 +143,8 @@ __rpc_getbroadifs(int af, int proto, int socktype, broadlist_t *list)
 		return 0;
 
 	for (ifap = ifp; ifap != NULL; ifap = ifap->ifa_next) {
-		if (ifap->ifa_addr->sa_family != af ||
+		if (ifap->ifa_addr == NULL ||		/* happens for eg tuntap devices */
+		    ifap->ifa_addr->sa_family != af ||
 		    !(ifap->ifa_flags & IFF_UP))
 			continue;
 		bip = (struct broadif *)malloc(sizeof *bip);
-- 
1.7.12.4

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File libtirpc-getbroadifs-crash.patch of Package libtirpc.4759

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